hostapd/driver_nl80211.c

   1 /*
   2  * hostapd / Kernel driver communication via nl80211
   3  * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Alternatively, this software may be distributed under the terms of BSD
  13  * license.
  14  *
  15  * See README and COPYING for more details.
  16  */
  17
  18 #include "includes.h"
  19
  20 #include <sys/ioctl.h>
  21 #include <netlink/genl/genl.h>
  22 #include <netlink/genl/family.h>
  23 #include <netlink/genl/ctrl.h>
  24 #include <netlink/msg.h>
  25 #include <netlink/attr.h>
  26 #include <linux/nl80211.h>
  27 #include <net/if.h>
  28 #include <linux/if_packet.h>
  29 #include <linux/if_ether.h>   /* The L2 protocols */
  30 #include "wireless_copy.h"
  31 #include <net/if_arp.h>
  32
  33 #include "hostapd.h"
  34 #include "driver.h"
  35 #include "ieee802_1x.h"
  36 #include "eloop.h"
  37 #include "ieee802_11.h"
  38 #include "sta_info.h"
  39 #include "hw_features.h"
  40 #include "mlme.h"
  41 #include "radiotap.h"
  42 #include "radiotap_iter.h"
  43
  44 enum ieee80211_msg_type {
  45         ieee80211_msg_normal = 0,
  46         ieee80211_msg_tx_callback_ack = 1,
  47         ieee80211_msg_tx_callback_fail = 2,
  48 };
  49
  50 struct i802_driver_data {
  51         struct hostapd_data *hapd;
  52
  53         char iface[IFNAMSIZ + 1];
  54         int bridge;
  55         int ioctl_sock; /* socket for ioctl() use */
  56         int wext_sock; /* socket for wireless events */
  57         int eapol_sock; /* socket for EAPOL frames */
  58         int monitor_sock; /* socket for monitor */
  59         int monitor_ifidx;
  60
  61         int default_if_indices[16];
  62         int *if_indices;
  63         int num_if_indices;
  64
  65         int we_version;
  66         struct nl_handle *nl_handle;
  67         struct nl_cache *nl_cache;
  68         struct nl_cb *nl_cb;
  69         struct genl_family *nl80211;
  70         int dtim_period, beacon_int;
  71         unsigned int beacon_set:1;
  72         unsigned int ieee802_1x_active:1;
  73 };
  74
  75
  76 static void add_ifidx(struct i802_driver_data *drv, int ifidx)
  77 {
  78         int i;
  79         int *old;
  80
  81         for (i = 0; i < drv->num_if_indices; i++) {
  82                 if (drv->if_indices[i] == 0) {
  83                         drv->if_indices[i] = ifidx;
  84                         return;
  85                 }
  86         }
  87
  88         if (drv->if_indices != drv->default_if_indices)
  89                 old = drv->if_indices;
  90         else
  91                 old = NULL;
  92
  93         drv->if_indices = realloc(old,
  94                                   sizeof(int) * (drv->num_if_indices + 1));
  95         if (!drv->if_indices) {
  96                 if (!old)
  97                         drv->if_indices = drv->default_if_indices;
  98                 else
  99                         drv->if_indices = old;
 100                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
 101                            "interfaces");
 102                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
 103                 return;
 104         }
 105         drv->if_indices[drv->num_if_indices] = ifidx;
 106         drv->num_if_indices++;
 107 }
 108
 109
 110 static void del_ifidx(struct i802_driver_data *drv, int ifidx)
 111 {
 112         int i;
 113
 114         for (i = 0; i < drv->num_if_indices; i++) {
 115                 if (drv->if_indices[i] == ifidx) {
 116                         drv->if_indices[i] = 0;
 117                         break;
 118                 }
 119         }
 120 }
 121
 122
 123 static int have_ifidx(struct i802_driver_data *drv, int ifidx)
 124 {
 125         int i;
 126
 127         if (ifidx == drv->bridge)
 128                 return 1;
 129
 130         for (i = 0; i < drv->num_if_indices; i++)
 131                 if (drv->if_indices[i] == ifidx)
 132                         return 1;
 133
 134         return 0;
 135 }
 136
 137
 138 /* helper for netlink get routines */
 139 static int ack_wait_handler(struct nl_msg *msg, void *arg)
 140 {
 141         int *finished = arg;
 142
 143         *finished = 1;
 144         return NL_STOP;
 145 }
 146
 147
 148 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
 149                                    const char *ifname, int dev_up)
 150 {
 151         struct ifreq ifr;
 152
 153         if (drv->ioctl_sock < 0)
 154                 return -1;
 155
 156         memset(&ifr, 0, sizeof(ifr));
 157         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 158
 159         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 160                 perror("ioctl[SIOCGIFFLAGS]");
 161                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 162                            drv->iface);
 163                 return -1;
 164         }
 165
 166         if (dev_up)
 167                 ifr.ifr_flags |= IFF_UP;
 168         else
 169                 ifr.ifr_flags &= ~IFF_UP;
 170
 171         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 172                 perror("ioctl[SIOCSIFFLAGS]");
 173                 return -1;
 174         }
 175
 176         return 0;
 177 }
 178
 179
 180 static int nl_set_encr(int ifindex, struct i802_driver_data *drv,
 181                        const char *alg, const u8 *addr, int idx, const u8 *key,
 182                        size_t key_len, int txkey)
 183 {
 184         struct nl_msg *msg;
 185         int ret = -1;
 186         int err = 0;
 187
 188         msg = nlmsg_alloc();
 189         if (!msg)
 190                 goto out;
 191
 192         if (strcmp(alg, "none") == 0) {
 193                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 194                             0, NL80211_CMD_DEL_KEY, 0);
 195         } else {
 196                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 197                             0, NL80211_CMD_NEW_KEY, 0);
 198                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
 199                 if (strcmp(alg, "WEP") == 0) {
 200                         if (key_len == 5)
 201                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 202                                             0x000FAC01);
 203                         else
 204                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 205                                             0x000FAC05);
 206                 } else if (strcmp(alg, "TKIP") == 0)
 207                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
 208                 else if (strcmp(alg, "CCMP") == 0)
 209                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
 210                 else if (strcmp(alg, "IGTK") == 0)
 211                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
 212                 else {
 213                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
 214                                    "algorithm '%s'", __func__, alg);
 215                         goto out;
 216                 }
 217         }
 218
 219         if (addr)
 220                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 221         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 222         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 223
 224         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 225             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
 226                 if (err != -ENOENT) {
 227                         ret = 0;
 228                         goto out;
 229                 }
 230         }
 231
 232         /*
 233          * If we need to set the default TX key we do that below,
 234          * otherwise we're done here.
 235          */
 236         if (!txkey || addr) {
 237                 ret = 0;
 238                 goto out;
 239         }
 240
 241         nlmsg_free(msg);
 242
 243         msg = nlmsg_alloc();
 244         if (!msg)
 245                 goto out;
 246
 247         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 248                     0, NL80211_CMD_SET_KEY, 0);
 249         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 250         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 251 #ifdef NL80211_MFP_PENDING
 252         if (strcmp(alg, "IGTK") == 0)
 253                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
 254         else
 255                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 256 #else /* NL80211_MFP_PENDING */
 257         NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 258 #endif /* NL80211_MFP_PENDING */
 259
 260         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 261             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
 262                 if (err != -ENOENT) {
 263                         ret = 0;
 264                         goto out;
 265                 }
 266         }
 267
 268         ret = 0;
 269
 270  out:
 271  nla_put_failure:
 272         nlmsg_free(msg);
 273         return ret;
 274 }
 275
 276
 277 static int i802_set_encryption(const char *iface, void *priv, const char *alg,
 278                                const u8 *addr, int idx, const u8 *key,
 279                                size_t key_len, int txkey)
 280 {
 281         struct i802_driver_data *drv = priv;
 282         int ret;
 283
 284         ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, idx, key,
 285                           key_len, txkey);
 286         if (ret < 0)
 287                 return ret;
 288
 289         if (strcmp(alg, "IGTK") == 0) {
 290                 ret = nl_set_encr(drv->monitor_ifidx, drv, alg, addr, idx, key,
 291                                   key_len, txkey);
 292         }
 293
 294         return ret;
 295 }
 296
 297
 298 static inline int min_int(int a, int b)
 299 {
 300         if (a < b)
 301                 return a;
 302         return b;
 303 }
 304
 305
 306 static int get_key_handler(struct nl_msg *msg, void *arg)
 307 {
 308         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 309         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 310
 311         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 312                   genlmsg_attrlen(gnlh, 0), NULL);
 313
 314         /*
 315          * TODO: validate the key index and mac address!
 316          * Otherwise, there's a race condition as soon as
 317          * the kernel starts sending key notifications.
 318          */
 319
 320         if (tb[NL80211_ATTR_KEY_SEQ])
 321                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 322                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
 323         return NL_SKIP;
 324 }
 325
 326
 327 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
 328                            int idx, u8 *seq)
 329 {
 330         struct i802_driver_data *drv = priv;
 331         struct nl_msg *msg;
 332         struct nl_cb *cb = NULL;
 333         int ret = -1;
 334         int err = 0;
 335         int finished = 0;
 336
 337         msg = nlmsg_alloc();
 338         if (!msg)
 339                 goto out;
 340
 341         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 342                     0, NL80211_CMD_GET_KEY, 0);
 343
 344         if (addr)
 345                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 346         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 347         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
 348
 349         cb = nl_cb_clone(drv->nl_cb);
 350         if (!cb)
 351                 goto out;
 352
 353         memset(seq, 0, 6);
 354
 355         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
 356                 goto out;
 357
 358         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_key_handler, seq);
 359         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
 360
 361         err = nl_recvmsgs(drv->nl_handle, cb);
 362
 363         if (!finished)
 364                 err = nl_wait_for_ack(drv->nl_handle);
 365
 366         if (err < 0)
 367                 goto out;
 368
 369         ret = 0;
 370
 371  out:
 372         nl_cb_put(cb);
 373  nla_put_failure:
 374         nlmsg_free(msg);
 375         return ret;
 376 }
 377
 378
 379 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
 380                               int mode)
 381 {
 382         return -1;
 383 }
 384
 385
 386 static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
 387                          int len)
 388 {
 389         struct i802_driver_data *drv = priv;
 390         struct iwreq iwr;
 391
 392         memset(&iwr, 0, sizeof(iwr));
 393         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
 394         iwr.u.essid.flags = 1; /* SSID active */
 395         iwr.u.essid.pointer = (caddr_t) buf;
 396         iwr.u.essid.length = len;
 397
 398         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 399                 perror("ioctl[SIOCSIWESSID]");
 400                 printf("len=%d\n", len);
 401                 return -1;
 402         }
 403
 404         return 0;
 405 }
 406
 407
 408 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
 409                                 int flags)
 410 {
 411         __u8 rtap_hdr[] = {
 412                 0x00, 0x00, /* radiotap version */
 413                 0x0e, 0x00, /* radiotap length */
 414                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
 415                 0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
 416                 0x00,       /* padding */
 417                 0x00, 0x00, /* RX and TX flags to indicate that */
 418                 0x00, 0x00, /* this is the injected frame directly */
 419         };
 420         struct i802_driver_data *drv = priv;
 421         struct iovec iov[2] = {
 422                 {
 423                         .iov_base = &rtap_hdr,
 424                         .iov_len = sizeof(rtap_hdr),
 425                 },
 426                 {
 427                         .iov_base = (void*)data,
 428                         .iov_len = len,
 429                 }
 430         };
 431         struct msghdr msg = {
 432                 .msg_name = NULL,
 433                 .msg_namelen = 0,
 434                 .msg_iov = iov,
 435                 .msg_iovlen = 2,
 436                 .msg_control = NULL,
 437                 .msg_controllen = 0,
 438                 .msg_flags = 0,
 439         };
 440
 441         return sendmsg(drv->monitor_sock, &msg, flags);
 442 }
 443
 444
 445 /* Set kernel driver on given frequency (MHz) */
 446 static int i802_set_freq(void *priv, int mode, int freq)
 447 {
 448         struct i802_driver_data *drv = priv;
 449         struct iwreq iwr;
 450
 451         memset(&iwr, 0, sizeof(iwr));
 452         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 453         iwr.u.freq.m = freq;
 454         iwr.u.freq.e = 6;
 455
 456         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 457                 perror("ioctl[SIOCSIWFREQ]");
 458                 return -1;
 459         }
 460
 461         return 0;
 462 }
 463
 464
 465 static int i802_set_rts(void *priv, int rts)
 466 {
 467         struct i802_driver_data *drv = priv;
 468         struct iwreq iwr;
 469
 470         memset(&iwr, 0, sizeof(iwr));
 471         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 472         iwr.u.rts.value = rts;
 473         iwr.u.rts.fixed = 1;
 474
 475         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 476                 perror("ioctl[SIOCSIWRTS]");
 477                 return -1;
 478         }
 479
 480         return 0;
 481 }
 482
 483
 484 static int i802_get_rts(void *priv, int *rts)
 485 {
 486         struct i802_driver_data *drv = priv;
 487         struct iwreq iwr;
 488
 489         memset(&iwr, 0, sizeof(iwr));
 490         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 491
 492         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 493                 perror("ioctl[SIOCGIWRTS]");
 494                 return -1;
 495         }
 496
 497         *rts = iwr.u.rts.value;
 498
 499         return 0;
 500 }
 501
 502
 503 static int i802_set_frag(void *priv, int frag)
 504 {
 505         struct i802_driver_data *drv = priv;
 506         struct iwreq iwr;
 507
 508         memset(&iwr, 0, sizeof(iwr));
 509         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 510         iwr.u.frag.value = frag;
 511         iwr.u.frag.fixed = 1;
 512
 513         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 514                 perror("ioctl[SIOCSIWFRAG]");
 515                 return -1;
 516         }
 517
 518         return 0;
 519 }
 520
 521
 522 static int i802_get_frag(void *priv, int *frag)
 523 {
 524         struct i802_driver_data *drv = priv;
 525         struct iwreq iwr;
 526
 527         memset(&iwr, 0, sizeof(iwr));
 528         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 529
 530         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 531                 perror("ioctl[SIOCGIWFRAG]");
 532                 return -1;
 533         }
 534
 535         *frag = iwr.u.frag.value;
 536
 537         return 0;
 538 }
 539
 540
 541 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 542 {
 543         struct i802_driver_data *drv = priv;
 544         struct iwreq iwr;
 545
 546         memset(&iwr, 0, sizeof(iwr));
 547         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 548
 549         iwr.u.retry.value = short_retry;
 550         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 551         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 552                 perror("ioctl[SIOCSIWRETRY(short)]");
 553                 return -1;
 554         }
 555
 556         iwr.u.retry.value = long_retry;
 557         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 558         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 559                 perror("ioctl[SIOCSIWRETRY(long)]");
 560                 return -1;
 561         }
 562
 563         return 0;
 564 }
 565
 566
 567 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 568 {
 569         struct i802_driver_data *drv = priv;
 570         struct iwreq iwr;
 571
 572         memset(&iwr, 0, sizeof(iwr));
 573         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 574
 575         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 576         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 577                 perror("ioctl[SIOCGIWFRAG(short)]");
 578                 return -1;
 579         }
 580         *short_retry = iwr.u.retry.value;
 581
 582         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 583         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 584                 perror("ioctl[SIOCGIWFRAG(long)]");
 585                 return -1;
 586         }
 587         *long_retry = iwr.u.retry.value;
 588
 589         return 0;
 590 }
 591
 592
 593 static int i802_flush(void *priv)
 594 {
 595         struct i802_driver_data *drv = priv;
 596         struct nl_msg *msg;
 597         int ret = -1;
 598
 599         msg = nlmsg_alloc();
 600         if (!msg)
 601                 goto out;
 602
 603         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 604                     0, NL80211_CMD_DEL_STATION, 0);
 605
 606         /*
 607          * XXX: FIX! this needs to flush all VLANs too
 608          */
 609         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 610                     if_nametoindex(drv->iface));
 611
 612         ret = 0;
 613
 614         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 615             nl_wait_for_ack(drv->nl_handle) < 0) {
 616                 ret = -1;
 617         }
 618
 619  nla_put_failure:
 620         nlmsg_free(msg);
 621
 622  out:
 623         return ret;
 624 }
 625
 626
 627 static int get_sta_handler(struct nl_msg *msg, void *arg)
 628 {
 629         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 630         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 631         struct hostap_sta_driver_data *data = arg;
 632         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 633         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 634                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 635                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 636                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 637         };
 638
 639         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 640                   genlmsg_attrlen(gnlh, 0), NULL);
 641
 642         /*
 643          * TODO: validate the interface and mac address!
 644          * Otherwise, there's a race condition as soon as
 645          * the kernel starts sending station notifications.
 646          */
 647
 648         if (!tb[NL80211_ATTR_STA_INFO]) {
 649                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 650                 return NL_SKIP;
 651         }
 652         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 653                              tb[NL80211_ATTR_STA_INFO],
 654                              stats_policy)) {
 655                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 656                 return NL_SKIP;
 657         }
 658
 659         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 660                 data->inactive_msec =
 661                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 662         if (stats[NL80211_STA_INFO_RX_BYTES])
 663                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 664         if (stats[NL80211_STA_INFO_TX_BYTES])
 665                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 666
 667         return NL_SKIP;
 668 }
 669
 670 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 671                               const u8 *addr)
 672 {
 673         struct i802_driver_data *drv = priv;
 674         struct nl_msg *msg;
 675         struct nl_cb *cb = NULL;
 676         int ret = -1;
 677         int err = 0;
 678         int finished = 0;
 679
 680         msg = nlmsg_alloc();
 681         if (!msg)
 682                 goto out;
 683
 684         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 685                     0, NL80211_CMD_GET_STATION, 0);
 686
 687         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 688         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 689
 690         cb = nl_cb_clone(drv->nl_cb);
 691         if (!cb)
 692                 goto out;
 693
 694         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
 695                 goto out;
 696
 697         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_sta_handler, data);
 698         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
 699
 700         err = nl_recvmsgs(drv->nl_handle, cb);
 701
 702         if (!finished)
 703                 err = nl_wait_for_ack(drv->nl_handle);
 704
 705         if (err < 0)
 706                 goto out;
 707
 708         ret = 0;
 709
 710  out:
 711         nl_cb_put(cb);
 712  nla_put_failure:
 713         nlmsg_free(msg);
 714         return ret;
 715
 716 }
 717
 718
 719 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 720                            size_t data_len, int encrypt, const u8 *own_addr)
 721 {
 722         struct i802_driver_data *drv = priv;
 723         struct ieee80211_hdr *hdr;
 724         size_t len;
 725         u8 *pos;
 726         int res;
 727 #if 0 /* FIX */
 728         int qos = sta->flags & WLAN_STA_WME;
 729 #else
 730         int qos = 0;
 731 #endif
 732
 733         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 734                 data_len;
 735         hdr = os_zalloc(len);
 736         if (hdr == NULL) {
 737                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 738                        (unsigned long) len);
 739                 return -1;
 740         }
 741
 742         hdr->frame_control =
 743                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 744         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 745         if (encrypt)
 746                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 747 #if 0 /* To be enabled if qos determination is added above */
 748         if (qos) {
 749                 hdr->frame_control |=
 750                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 751         }
 752 #endif
 753
 754         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 755         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 756         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 757         pos = (u8 *) (hdr + 1);
 758
 759 #if 0 /* To be enabled if qos determination is added above */
 760         if (qos) {
 761                 /* add an empty QoS header if needed */
 762                 pos[0] = 0;
 763                 pos[1] = 0;
 764                 pos += 2;
 765         }
 766 #endif
 767
 768         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 769         pos += sizeof(rfc1042_header);
 770         WPA_PUT_BE16(pos, ETH_P_PAE);
 771         pos += 2;
 772         memcpy(pos, data, data_len);
 773
 774         res = i802_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
 775         free(hdr);
 776
 777         if (res < 0) {
 778                 perror("i802_send_eapol: send");
 779                 printf("i802_send_eapol - packet len: %lu - failed\n",
 780                        (unsigned long) len);
 781         }
 782
 783         return res;
 784 }
 785
 786
 787 static int i802_sta_add2(const char *ifname, void *priv,
 788                          struct hostapd_sta_add_params *params)
 789 {
 790         struct i802_driver_data *drv = priv;
 791         struct nl_msg *msg;
 792         int ret = -1;
 793
 794         msg = nlmsg_alloc();
 795         if (!msg)
 796                 goto out;
 797
 798         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 799                     0, NL80211_CMD_NEW_STATION, 0);
 800
 801         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 802                     if_nametoindex(drv->iface));
 803         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
 804         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
 805         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
 806                 params->supp_rates);
 807         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
 808                     params->listen_interval);
 809
 810 #ifdef CONFIG_IEEE80211N
 811 #ifdef NL80211_ATTR_HT_CAPABILITY
 812         if (params->ht_capabilities) {
 813                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
 814                         params->ht_capabilities->length,
 815                         &params->ht_capabilities->data);
 816         }
 817 #endif /* NL80211_ATTR_HT_CAPABILITY */
 818 #endif /* CONFIG_IEEE80211N */
 819
 820         ret = nl_send_auto_complete(drv->nl_handle, msg);
 821         if (ret < 0)
 822                 goto nla_put_failure;
 823
 824         ret = nl_wait_for_ack(drv->nl_handle);
 825         /* ignore EEXIST, this happens if a STA associates while associated */
 826         if (ret == -EEXIST || ret >= 0)
 827                 ret = 0;
 828
 829  nla_put_failure:
 830         nlmsg_free(msg);
 831
 832  out:
 833         return ret;
 834 }
 835
 836
 837 static int i802_sta_remove(void *priv, const u8 *addr)
 838 {
 839         struct i802_driver_data *drv = priv;
 840         struct nl_msg *msg;
 841         int ret = -1;
 842
 843         msg = nlmsg_alloc();
 844         if (!msg)
 845                 goto out;
 846
 847         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 848                     0, NL80211_CMD_DEL_STATION, 0);
 849
 850         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 851                     if_nametoindex(drv->iface));
 852         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 853
 854         ret = 0;
 855
 856         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 857             nl_wait_for_ack(drv->nl_handle) < 0) {
 858                 ret = -1;
 859         }
 860
 861  nla_put_failure:
 862         nlmsg_free(msg);
 863
 864  out:
 865         return ret;
 866 }
 867
 868
 869 static int i802_sta_set_flags(void *priv, const u8 *addr,
 870                               int total_flags, int flags_or, int flags_and)
 871 {
 872         struct i802_driver_data *drv = priv;
 873         struct nl_msg *msg, *flags = NULL;
 874         int ret = -1;
 875
 876         msg = nlmsg_alloc();
 877         if (!msg)
 878                 goto out;
 879
 880         flags = nlmsg_alloc();
 881         if (!flags)
 882                 goto free_msg;
 883
 884         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 885                     0, NL80211_CMD_SET_STATION, 0);
 886
 887         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 888                     if_nametoindex(drv->iface));
 889         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 890
 891         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 892                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 893
 894         if (total_flags & WLAN_STA_WME)
 895                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 896
 897         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 898                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 899
 900 #ifdef NL80211_MFP_PENDING
 901         if (total_flags & WLAN_STA_MFP)
 902                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 903 #endif /* NL80211_MFP_PENDING */
 904
 905         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 906                 goto nla_put_failure;
 907
 908         ret = 0;
 909
 910         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 911             nl_wait_for_ack(drv->nl_handle) < 0) {
 912                 ret = -1;
 913         }
 914
 915  nla_put_failure:
 916         nlmsg_free(flags);
 917
 918  free_msg:
 919         nlmsg_free(msg);
 920
 921  out:
 922         return ret;
 923 }
 924
 925
 926 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
 927                                  unsigned char power_level,
 928                                  unsigned char antenna_max)
 929 {
 930         return -1;
 931 }
 932
 933
 934 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 935 {
 936         return -1;
 937 }
 938
 939
 940 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 941                                     int cw_min, int cw_max, int burst_time)
 942 {
 943         return -1;
 944 }
 945
 946
 947 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 948 {
 949         struct nl_msg *msg;
 950
 951         /* stop listening for EAPOL on this interface */
 952         del_ifidx(drv, ifidx);
 953
 954         msg = nlmsg_alloc();
 955         if (!msg)
 956                 goto nla_put_failure;
 957
 958         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 959                     0, NL80211_CMD_DEL_INTERFACE, 0);
 960         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 961         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 962             nl_wait_for_ack(drv->nl_handle) < 0)
 963         nla_put_failure:
 964                 printf("Failed to remove interface.\n");
 965         nlmsg_free(msg);
 966 }
 967
 968
 969 static int nl80211_create_iface(struct i802_driver_data *drv,
 970                                 const char *ifname,
 971                                 enum nl80211_iftype iftype,
 972                                 const u8 *addr)
 973 {
 974         struct nl_msg *msg, *flags = NULL;
 975         int ifidx;
 976         struct ifreq ifreq;
 977         struct iwreq iwr;
 978
 979         msg = nlmsg_alloc();
 980         if (!msg)
 981                 return -1;
 982
 983         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 984                     0, NL80211_CMD_NEW_INTERFACE, 0);
 985         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 986                     if_nametoindex(drv->hapd->conf->iface));
 987         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 988         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 989
 990         if (iftype == NL80211_IFTYPE_MONITOR) {
 991                 int err;
 992
 993                 flags = nlmsg_alloc();
 994                 if (!flags)
 995                         goto nla_put_failure;
 996
 997                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
 998
 999                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1000
1001                 nlmsg_free(flags);
1002
1003                 if (err)
1004                         goto nla_put_failure;
1005         }
1006
1007         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1008             nl_wait_for_ack(drv->nl_handle) < 0) {
1009  nla_put_failure:
1010                 printf("Failed to create interface %s.\n", ifname);
1011                 nlmsg_free(msg);
1012                 return -1;
1013         }
1014
1015         nlmsg_free(msg);
1016
1017         ifidx = if_nametoindex(ifname);
1018
1019         if (ifidx <= 0)
1020                 return -1;
1021
1022         /* start listening for EAPOL on this interface */
1023         add_ifidx(drv, ifidx);
1024
1025         if (addr) {
1026                 switch (iftype) {
1027                 case NL80211_IFTYPE_AP:
1028                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1029                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1030                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1031
1032                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1033                                 nl80211_remove_iface(drv, ifidx);
1034                                 return -1;
1035                         }
1036                         break;
1037                 case NL80211_IFTYPE_WDS:
1038                         memset(&iwr, 0, sizeof(iwr));
1039                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1040                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1041                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1042                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1043                                 return -1;
1044                         break;
1045                 default:
1046                         /* nothing */
1047                         break;
1048                 }
1049         }
1050
1051         return ifidx;
1052 }
1053
1054
1055 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1056 {
1057         int ifidx;
1058
1059         /*
1060          * The kernel supports that when the low-level driver does,
1061          * but we currently don't because we need per-BSS data that
1062          * currently we can't handle easily.
1063          */
1064         return -1;
1065
1066         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1067         if (ifidx < 0)
1068                 return -1;
1069         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1070                 nl80211_remove_iface(priv, ifidx);
1071                 return -1;
1072         }
1073         return 0;
1074 }
1075
1076
1077 static int i802_bss_remove(void *priv, const char *ifname)
1078 {
1079         nl80211_remove_iface(priv, if_nametoindex(ifname));
1080         return 0;
1081 }
1082
1083
1084 static int i802_set_beacon(const char *iface, void *priv,
1085                            u8 *head, size_t head_len,
1086                            u8 *tail, size_t tail_len)
1087 {
1088         struct i802_driver_data *drv = priv;
1089         struct nl_msg *msg;
1090         u8 cmd = NL80211_CMD_NEW_BEACON;
1091         int ret = -1;
1092
1093         msg = nlmsg_alloc();
1094         if (!msg)
1095                 goto out;
1096
1097         if (drv->beacon_set)
1098                 cmd = NL80211_CMD_SET_BEACON;
1099
1100         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1101                     0, cmd, 0);
1102         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1103         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1104         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1105         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1106
1107         if (!drv->dtim_period)
1108                 drv->dtim_period = 2;
1109         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1110
1111         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1112             nl_wait_for_ack(drv->nl_handle) < 0)
1113                 goto out;
1114
1115         ret = 0;
1116
1117         drv->beacon_set = 1;
1118
1119  out:
1120  nla_put_failure:
1121         nlmsg_free(msg);
1122         return ret;
1123 }
1124
1125
1126 static int i802_del_beacon(struct i802_driver_data *drv)
1127 {
1128         struct nl_msg *msg;
1129         int ret = -1;
1130
1131         msg = nlmsg_alloc();
1132         if (!msg)
1133                 goto out;
1134
1135         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1136                     0, NL80211_CMD_DEL_BEACON, 0);
1137         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1138
1139         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1140             nl_wait_for_ack(drv->nl_handle) < 0)
1141                 goto out;
1142
1143         ret = 0;
1144
1145  out:
1146  nla_put_failure:
1147         nlmsg_free(msg);
1148         return ret;
1149 }
1150
1151
1152 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1153 {
1154         struct i802_driver_data *drv = priv;
1155
1156         /*
1157          * FIXME: This needs to be per interface (BSS)
1158          */
1159         drv->ieee802_1x_active = enabled;
1160         return 0;
1161 }
1162
1163
1164 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1165 {
1166         struct i802_driver_data *drv = priv;
1167         struct iwreq iwr;
1168
1169         memset(&iwr, 0, sizeof(iwr));
1170
1171         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1172         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1173         iwr.u.param.value = enabled;
1174
1175         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1176
1177         /* ignore errors, the kernel/driver might not care */
1178         return 0;
1179 }
1180
1181
1182 static int i802_set_internal_bridge(void *priv, int value)
1183 {
1184         return -1;
1185 }
1186
1187
1188 static int i802_set_beacon_int(void *priv, int value)
1189 {
1190         struct i802_driver_data *drv = priv;
1191         struct nl_msg *msg;
1192         int ret = -1;
1193
1194         drv->beacon_int = value;
1195
1196         if (!drv->beacon_set)
1197                 return 0;
1198
1199         msg = nlmsg_alloc();
1200         if (!msg)
1201                 goto out;
1202
1203         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1204                     0, NL80211_CMD_SET_BEACON, 0);
1205         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1206
1207         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1208
1209         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1210             nl_wait_for_ack(drv->nl_handle) < 0)
1211                 goto out;
1212
1213         ret = 0;
1214
1215  out:
1216  nla_put_failure:
1217         nlmsg_free(msg);
1218         return ret;
1219 }
1220
1221
1222 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1223 {
1224         struct i802_driver_data *drv = priv;
1225         struct nl_msg *msg;
1226         int ret = -1;
1227
1228         msg = nlmsg_alloc();
1229         if (!msg)
1230                 goto out;
1231
1232         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1233                     0, NL80211_CMD_SET_BEACON, 0);
1234         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1235
1236         drv->dtim_period = value;
1237         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1238
1239         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1240             nl_wait_for_ack(drv->nl_handle) < 0)
1241                 goto out;
1242
1243         ret = 0;
1244
1245  out:
1246  nla_put_failure:
1247         nlmsg_free(msg);
1248         return ret;
1249 }
1250
1251
1252 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1253 {
1254 #ifdef NL80211_CMD_SET_BSS
1255         struct i802_driver_data *drv = priv;
1256         struct nl_msg *msg;
1257         int ret = -1;
1258
1259         msg = nlmsg_alloc();
1260         if (!msg)
1261                 goto out;
1262
1263         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1264                     NL80211_CMD_SET_BSS, 0);
1265
1266         if (cts >= 0)
1267                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1268         if (preamble >= 0)
1269                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1270         if (slot >= 0)
1271                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1272
1273         ret = 0;
1274
1275         /* TODO: multi-BSS support */
1276         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1277
1278         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1279             nl_wait_for_ack(drv->nl_handle) < 0) {
1280                 ret = -1;
1281         }
1282
1283 nla_put_failure:
1284         nlmsg_free(msg);
1285
1286 out:
1287         return ret;
1288 #else /* NL80211_CMD_SET_BSS */
1289         return -1;
1290 #endif /* NL80211_CMD_SET_BSS */
1291 }
1292
1293
1294 static int i802_set_cts_protect(void *priv, int value)
1295 {
1296         return i802_set_bss(priv, value, -1, -1);
1297 }
1298
1299
1300 static int i802_set_preamble(void *priv, int value)
1301 {
1302         return i802_set_bss(priv, -1, value, -1);
1303 }
1304
1305
1306 static int i802_set_short_slot_time(void *priv, int value)
1307 {
1308         return i802_set_bss(priv, -1, -1, value);
1309 }
1310
1311
1312 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1313 {
1314         switch (type) {
1315         case HOSTAPD_IF_VLAN:
1316                 return NL80211_IFTYPE_AP_VLAN;
1317         case HOSTAPD_IF_WDS:
1318                 return NL80211_IFTYPE_WDS;
1319         }
1320         return -1;
1321 }
1322
1323
1324 static int i802_if_add(const char *iface, void *priv,
1325                        enum hostapd_driver_if_type type, char *ifname,
1326                        const u8 *addr)
1327 {
1328         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1329                 return -1;
1330         return 0;
1331 }
1332
1333
1334 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1335                           char *ifname, const u8 *addr)
1336 {
1337         /* unused at the moment */
1338         return -1;
1339 }
1340
1341
1342 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1343                           const char *ifname, const u8 *addr)
1344 {
1345         nl80211_remove_iface(priv, if_nametoindex(ifname));
1346         return 0;
1347 }
1348
1349
1350 struct phy_info_arg {
1351         u16 *num_modes;
1352         struct hostapd_hw_modes *modes;
1353         int error;
1354 };
1355
1356 static int phy_info_handler(struct nl_msg *msg, void *arg)
1357 {
1358         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1359         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1360         struct phy_info_arg *phy_info = arg;
1361
1362         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1363
1364         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1365         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1366                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1367                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1368                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1369                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1370                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1371         };
1372
1373         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1374         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1375                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1376                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1377         };
1378
1379         struct nlattr *nl_band;
1380         struct nlattr *nl_freq;
1381         struct nlattr *nl_rate;
1382         int rem_band, rem_freq, rem_rate;
1383         struct hostapd_hw_modes *mode;
1384         int idx, mode_is_set;
1385
1386         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1387                   genlmsg_attrlen(gnlh, 0), NULL);
1388
1389         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1390                 return NL_SKIP;
1391
1392         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1393                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1394                 if (!mode)
1395                         return NL_SKIP;
1396                 phy_info->modes = mode;
1397
1398                 mode_is_set = 0;
1399
1400                 mode = &phy_info->modes[*(phy_info->num_modes)];
1401                 memset(mode, 0, sizeof(*mode));
1402                 *(phy_info->num_modes) += 1;
1403
1404                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1405                           nla_len(nl_band), NULL);
1406
1407                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1408                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1409                                   nla_len(nl_freq), freq_policy);
1410                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1411                                 continue;
1412                         mode->num_channels++;
1413                 }
1414
1415                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1416                 if (!mode->channels)
1417                         return NL_SKIP;
1418
1419                 idx = 0;
1420
1421                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1422                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1423                                   nla_len(nl_freq), freq_policy);
1424                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1425                                 continue;
1426
1427                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1428                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1429                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1430                                                     HOSTAPD_CHAN_W_IBSS;
1431
1432                         if (!mode_is_set) {
1433                                 /* crude heuristic */
1434                                 if (mode->channels[idx].freq < 4000)
1435                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1436                                 else
1437                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1438                                 mode_is_set = 1;
1439                         }
1440
1441                         /* crude heuristic */
1442                         if (mode->channels[idx].freq < 4000)
1443                                 if (mode->channels[idx].freq == 2848)
1444                                         mode->channels[idx].chan = 14;
1445                                 else
1446                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1447                         else
1448                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1449
1450                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1451                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1452                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1453                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1454                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1455                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1456                         idx++;
1457                 }
1458
1459                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1460                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1461                                   nla_len(nl_rate), rate_policy);
1462                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1463                                 continue;
1464                         mode->num_rates++;
1465                 }
1466
1467                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1468                 if (!mode->rates)
1469                         return NL_SKIP;
1470
1471                 idx = 0;
1472
1473                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1474                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1475                                   nla_len(nl_rate), rate_policy);
1476                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1477                                 continue;
1478                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1479
1480                         /* crude heuristic */
1481                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1482                             mode->rates[idx].rate > 200)
1483                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1484
1485                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1486                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1487
1488                         idx++;
1489                 }
1490         }
1491
1492         phy_info->error = 0;
1493
1494         return NL_SKIP;
1495 }
1496
1497 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1498                                                          u16 *num_modes,
1499                                                          u16 *flags)
1500 {
1501         struct i802_driver_data *drv = priv;
1502         struct nl_msg *msg;
1503         int err = -1;
1504         struct nl_cb *cb = NULL;
1505         int finished = 0;
1506         struct phy_info_arg result = {
1507                 .num_modes = num_modes,
1508                 .modes = NULL,
1509                 .error = 1,
1510         };
1511
1512         *num_modes = 0;
1513         *flags = 0;
1514
1515         msg = nlmsg_alloc();
1516         if (!msg)
1517                 return NULL;
1518
1519         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1520                     0, NL80211_CMD_GET_WIPHY, 0);
1521
1522         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1523
1524         cb = nl_cb_clone(drv->nl_cb);
1525         if (!cb)
1526                 goto out;
1527
1528         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
1529                 goto out;
1530
1531         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
1532         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
1533
1534         err = nl_recvmsgs(drv->nl_handle, cb);
1535
1536         if (!finished)
1537                 err = nl_wait_for_ack(drv->nl_handle);
1538
1539         if (err < 0 || result.error) {
1540                 hostapd_free_hw_features(result.modes, *num_modes);
1541                 result.modes = NULL;
1542         }
1543
1544  out:
1545         nl_cb_put(cb);
1546  nla_put_failure:
1547         if (err)
1548                 fprintf(stderr, "failed to get information: %d\n", err);
1549         nlmsg_free(msg);
1550         return result.modes;
1551 }
1552
1553
1554 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1555                              const char *ifname, int vlan_id)
1556 {
1557         struct i802_driver_data *drv = priv;
1558         struct nl_msg *msg;
1559         int ret = -1;
1560
1561         msg = nlmsg_alloc();
1562         if (!msg)
1563                 goto out;
1564
1565         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1566                     0, NL80211_CMD_SET_STATION, 0);
1567
1568         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1569                     if_nametoindex(drv->iface));
1570         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1571         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1572                     if_nametoindex(ifname));
1573
1574         ret = 0;
1575
1576         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1577             (errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
1578                 ret = -1;
1579         }
1580
1581  nla_put_failure:
1582         nlmsg_free(msg);
1583
1584  out:
1585         return ret;
1586 }
1587
1588
1589 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1590 {
1591         struct sta_info *sta;
1592
1593         sta = ap_get_sta(hapd, ta);
1594         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1595                 printf("Data/PS-poll frame from not associated STA "
1596                        MACSTR "\n", MAC2STR(ta));
1597                 if (sta && (sta->flags & WLAN_STA_AUTH))
1598                         hostapd_sta_disassoc(
1599                                 hapd, ta,
1600                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1601                 else
1602                         hostapd_sta_deauth(
1603                                 hapd, ta,
1604                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1605         }
1606 }
1607
1608
1609 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1610                                int ok)
1611 {
1612         struct ieee80211_hdr *hdr;
1613         u16 fc, type, stype;
1614         struct sta_info *sta;
1615
1616         hdr = (struct ieee80211_hdr *) buf;
1617         fc = le_to_host16(hdr->frame_control);
1618
1619         type = WLAN_FC_GET_TYPE(fc);
1620         stype = WLAN_FC_GET_STYPE(fc);
1621
1622         switch (type) {
1623         case WLAN_FC_TYPE_MGMT:
1624                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1625                            ok ? "ACK" : "fail");
1626                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1627                 break;
1628         case WLAN_FC_TYPE_CTRL:
1629                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1630                            ok ? "ACK" : "fail");
1631                 break;
1632         case WLAN_FC_TYPE_DATA:
1633                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1634                            ok ? "ACK" : "fail");
1635                 sta = ap_get_sta(hapd, hdr->addr1);
1636                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1637                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1638                                    "activity poll", MAC2STR(sta->addr),
1639                                    ok ? "ACKed" : "did not ACK");
1640                         if (ok)
1641                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1642                 }
1643                 if (sta)
1644                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1645                 break;
1646         default:
1647                 printf("unknown TX callback frame type %d\n", type);
1648                 break;
1649         }
1650 }
1651
1652
1653 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1654                          struct hostapd_frame_info *hfi,
1655                          enum ieee80211_msg_type msg_type)
1656 {
1657         struct ieee80211_hdr *hdr;
1658         u16 fc, type, stype;
1659         size_t data_len = len;
1660         struct hostapd_data *hapd = NULL;
1661         int broadcast_bssid = 0;
1662         size_t i;
1663         u8 *bssid;
1664
1665         /*
1666          * PS-Poll frames are 16 bytes. All other frames are
1667          * 24 bytes or longer.
1668          */
1669         if (len < 16)
1670                 return;
1671
1672         hdr = (struct ieee80211_hdr *) buf;
1673         fc = le_to_host16(hdr->frame_control);
1674
1675         type = WLAN_FC_GET_TYPE(fc);
1676         stype = WLAN_FC_GET_STYPE(fc);
1677
1678         switch (type) {
1679         case WLAN_FC_TYPE_DATA:
1680                 if (len < 24)
1681                         return;
1682                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1683                 case WLAN_FC_TODS:
1684                         bssid = hdr->addr1;
1685                         break;
1686                 default:
1687                         /* discard */
1688                         return;
1689                 }
1690                 break;
1691         case WLAN_FC_TYPE_CTRL:
1692                 /* discard non-ps-poll frames */
1693                 if (stype != WLAN_FC_STYPE_PSPOLL)
1694                         return;
1695                 bssid = hdr->addr1;
1696                 break;
1697         case WLAN_FC_TYPE_MGMT:
1698                 bssid = hdr->addr3;
1699                 break;
1700         default:
1701                 /* discard */
1702                 return;
1703         }
1704
1705         /* find interface frame belongs to */
1706         for (i = 0; i < iface->num_bss; i++) {
1707                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1708                         hapd = iface->bss[i];
1709                         break;
1710                 }
1711         }
1712
1713         if (hapd == NULL) {
1714                 hapd = iface->bss[0];
1715
1716                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1717                     bssid[2] != 0xff || bssid[3] != 0xff ||
1718                     bssid[4] != 0xff || bssid[5] != 0xff) {
1719                         /*
1720                          * Unknown BSSID - drop frame if this is not from
1721                          * passive scanning or a beacon (at least ProbeReq
1722                          * frames to other APs may be allowed through RX
1723                          * filtering in the wlan hw/driver)
1724                          */
1725                         if ((type != WLAN_FC_TYPE_MGMT ||
1726                              stype != WLAN_FC_STYPE_BEACON))
1727                                 return;
1728                 } else
1729                         broadcast_bssid = 1;
1730         }
1731
1732         switch (msg_type) {
1733         case ieee80211_msg_normal:
1734                 /* continue processing */
1735                 break;
1736         case ieee80211_msg_tx_callback_ack:
1737                 handle_tx_callback(hapd, buf, data_len, 1);
1738                 return;
1739         case ieee80211_msg_tx_callback_fail:
1740                 handle_tx_callback(hapd, buf, data_len, 0);
1741                 return;
1742         }
1743
1744         switch (type) {
1745         case WLAN_FC_TYPE_MGMT:
1746                 if (stype != WLAN_FC_STYPE_BEACON &&
1747                     stype != WLAN_FC_STYPE_PROBE_REQ)
1748                         wpa_printf(MSG_MSGDUMP, "MGMT");
1749                 if (broadcast_bssid) {
1750                         for (i = 0; i < iface->num_bss; i++)
1751                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1752                                                 stype, hfi);
1753                 } else
1754                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1755                 break;
1756         case WLAN_FC_TYPE_CTRL:
1757                 /* can only get here with PS-Poll frames */
1758                 wpa_printf(MSG_DEBUG, "CTRL");
1759                 handle_unknown_sta(hapd, hdr->addr2);
1760                 break;
1761         case WLAN_FC_TYPE_DATA:
1762                 wpa_printf(MSG_DEBUG, "DATA");
1763                 handle_unknown_sta(hapd, hdr->addr2);
1764                 break;
1765         }
1766 }
1767
1768
1769 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1770 {
1771         struct i802_driver_data *drv = eloop_ctx;
1772         struct hostapd_data *hapd = drv->hapd;
1773         struct sockaddr_ll lladdr;
1774         unsigned char buf[3000];
1775         int len;
1776         socklen_t fromlen = sizeof(lladdr);
1777
1778         len = recvfrom(sock, buf, sizeof(buf), 0,
1779                        (struct sockaddr *)&lladdr, &fromlen);
1780         if (len < 0) {
1781                 perror("recv");
1782                 return;
1783         }
1784
1785         if (have_ifidx(drv, lladdr.sll_ifindex))
1786                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1787 }
1788
1789
1790 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1791 {
1792         struct i802_driver_data *drv = eloop_ctx;
1793         int len;
1794         unsigned char buf[3000];
1795         struct hostapd_data *hapd = drv->hapd;
1796         struct ieee80211_radiotap_iterator iter;
1797         int ret;
1798         struct hostapd_frame_info hfi;
1799         int injected = 0, failed = 0, msg_type, rxflags = 0;
1800
1801         len = recv(sock, buf, sizeof(buf), 0);
1802         if (len < 0) {
1803                 perror("recv");
1804                 return;
1805         }
1806
1807         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1808                 printf("received invalid radiotap frame\n");
1809                 return;
1810         }
1811
1812         memset(&hfi, 0, sizeof(hfi));
1813
1814         while (1) {
1815                 ret = ieee80211_radiotap_iterator_next(&iter);
1816                 if (ret == -ENOENT)
1817                         break;
1818                 if (ret) {
1819                         printf("received invalid radiotap frame (%d)\n", ret);
1820                         return;
1821                 }
1822                 switch (iter.this_arg_index) {
1823                 case IEEE80211_RADIOTAP_FLAGS:
1824                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1825                                 len -= 4;
1826                         break;
1827                 case IEEE80211_RADIOTAP_RX_FLAGS:
1828                         rxflags = 1;
1829                         break;
1830                 case IEEE80211_RADIOTAP_TX_FLAGS:
1831                         injected = 1;
1832                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1833                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1834                         break;
1835                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1836                         break;
1837                 case IEEE80211_RADIOTAP_CHANNEL:
1838                         /* TODO convert from freq/flags to channel number
1839                         hfi.channel = XXX;
1840                         hfi.phytype = XXX;
1841                          */
1842                         break;
1843                 case IEEE80211_RADIOTAP_RATE:
1844                         hfi.datarate = *iter.this_arg * 5;
1845                         break;
1846                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1847                         hfi.ssi_signal = *iter.this_arg;
1848                         break;
1849                 }
1850         }
1851
1852         if (rxflags && injected)
1853                 return;
1854
1855         if (!injected)
1856                 msg_type = ieee80211_msg_normal;
1857         else if (failed)
1858                 msg_type = ieee80211_msg_tx_callback_fail;
1859         else
1860                 msg_type = ieee80211_msg_tx_callback_ack;
1861
1862         handle_frame(hapd->iface, buf + iter.max_length,
1863                      len - iter.max_length, &hfi, msg_type);
1864 }
1865
1866
1867 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1868 {
1869         char buf[IFNAMSIZ];
1870         struct sockaddr_ll ll;
1871         int optval;
1872         socklen_t optlen;
1873
1874         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1875         buf[IFNAMSIZ - 1] = '\0';
1876
1877         drv->monitor_ifidx =
1878                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1879
1880         if (drv->monitor_ifidx < 0)
1881                 return -1;
1882
1883         if (hostapd_set_iface_flags(drv, buf, 1))
1884                 goto error;
1885
1886         memset(&ll, 0, sizeof(ll));
1887         ll.sll_family = AF_PACKET;
1888         ll.sll_ifindex = drv->monitor_ifidx;
1889         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1890         if (drv->monitor_sock < 0) {
1891                 perror("socket[PF_PACKET,SOCK_RAW]");
1892                 goto error;
1893         }
1894
1895         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1896                  sizeof(ll)) < 0) {
1897                 perror("monitor socket bind");
1898                 goto error;
1899         }
1900
1901         optlen = sizeof(optval);
1902         optval = 20;
1903         if (setsockopt
1904             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1905                 perror("Failed to set socket priority");
1906                 goto error;
1907         }
1908
1909         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1910                                      drv, NULL)) {
1911                 printf("Could not register monitor read socket\n");
1912                 goto error;
1913         }
1914
1915         return 0;
1916  error:
1917         nl80211_remove_iface(drv, drv->monitor_ifidx);
1918         return -1;
1919 }
1920
1921
1922 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1923                                    const char *ifname)
1924 {
1925         struct nl_msg *msg;
1926
1927         msg = nlmsg_alloc();
1928         if (!msg)
1929                 return -1;
1930
1931         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1932                     0, NL80211_CMD_SET_INTERFACE, 0);
1933         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1934                     if_nametoindex(ifname));
1935         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1936
1937         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1938             nl_wait_for_ack(drv->nl_handle) < 0) {
1939  nla_put_failure:
1940                 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1941                            "mode.", ifname);
1942                 nlmsg_free(msg);
1943                 return -1;
1944         }
1945
1946         nlmsg_free(msg);
1947
1948         return 0;
1949 }
1950
1951
1952 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1953 {
1954         struct ifreq ifr;
1955         struct sockaddr_ll addr;
1956
1957         drv->ioctl_sock = -1;
1958
1959         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1960         if (drv->ioctl_sock < 0) {
1961                 perror("socket[PF_INET,SOCK_DGRAM]");
1962                 return -1;
1963         }
1964
1965         /* start listening for EAPOL on the default AP interface */
1966         add_ifidx(drv, if_nametoindex(drv->iface));
1967
1968         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1969                 return -1;
1970
1971         if (bssid) {
1972                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1973                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1974                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1975
1976                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1977                         perror("ioctl(SIOCSIFHWADDR)");
1978                         return -1;
1979                 }
1980         }
1981
1982         /*
1983          * initialise generic netlink and nl80211
1984          */
1985         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1986         if (!drv->nl_cb) {
1987                 printf("Failed to allocate netlink callbacks.\n");
1988                 return -1;
1989         }
1990
1991         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1992         if (!drv->nl_handle) {
1993                 printf("Failed to allocate netlink handle.\n");
1994                 return -1;
1995         }
1996
1997         if (genl_connect(drv->nl_handle)) {
1998                 printf("Failed to connect to generic netlink.\n");
1999                 return -1;
2000         }
2001
2002         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
2003         if (!drv->nl_cache) {
2004                 printf("Failed to allocate generic netlink cache.\n");
2005                 return -1;
2006         }
2007
2008         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
2009         if (!drv->nl80211) {
2010                 printf("nl80211 not found.\n");
2011                 return -1;
2012         }
2013
2014         /* Initialise a monitor interface */
2015         if (nl80211_create_monitor_interface(drv))
2016                 return -1;
2017
2018         if (nl80211_set_master_mode(drv, drv->iface))
2019                 return -1;
2020
2021         if (hostapd_set_iface_flags(drv, drv->iface, 1))
2022                 return -1;
2023
2024         memset(&addr, 0, sizeof(addr));
2025         addr.sll_family = AF_PACKET;
2026         addr.sll_ifindex = ifr.ifr_ifindex;
2027         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
2028                    addr.sll_ifindex);
2029
2030         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
2031         if (drv->eapol_sock < 0) {
2032                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
2033                 return -1;
2034         }
2035
2036         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
2037         {
2038                 printf("Could not register read socket for eapol\n");
2039                 return -1;
2040         }
2041
2042         memset(&ifr, 0, sizeof(ifr));
2043         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
2044         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
2045                 perror("ioctl(SIOCGIFHWADDR)");
2046                 return -1;
2047         }
2048
2049         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
2050                 printf("Invalid HW-addr family 0x%04x\n",
2051                        ifr.ifr_hwaddr.sa_family);
2052                 return -1;
2053         }
2054         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
2055
2056         return 0;
2057 }
2058
2059
2060 static int i802_get_inact_sec(void *priv, const u8 *addr)
2061 {
2062         struct hostap_sta_driver_data data;
2063         int ret;
2064
2065         data.inactive_msec = (unsigned long) -1;
2066         ret = i802_read_sta_data(priv, &data, addr);
2067         if (ret || data.inactive_msec == (unsigned long) -1)
2068                 return -1;
2069         return data.inactive_msec / 1000;
2070 }
2071
2072
2073 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2074 {
2075 #if 0
2076         /* TODO */
2077 #endif
2078         return 0;
2079 }
2080
2081
2082 static void
2083 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2084                                        char *custom)
2085 {
2086         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2087
2088         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2089                 char *pos;
2090                 u8 addr[ETH_ALEN];
2091                 pos = strstr(custom, "addr=");
2092                 if (pos == NULL) {
2093                         wpa_printf(MSG_DEBUG,
2094                                    "MLME-MICHAELMICFAILURE.indication "
2095                                    "without sender address ignored");
2096                         return;
2097                 }
2098                 pos += 5;
2099                 if (hwaddr_aton(pos, addr) == 0) {
2100                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2101                 } else {
2102                         wpa_printf(MSG_DEBUG,
2103                                    "MLME-MICHAELMICFAILURE.indication "
2104                                    "with invalid MAC address");
2105                 }
2106         }
2107 }
2108
2109
2110 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2111                                             char *data, int len)
2112 {
2113         struct iw_event iwe_buf, *iwe = &iwe_buf;
2114         char *pos, *end, *custom, *buf;
2115
2116         pos = data;
2117         end = data + len;
2118
2119         while (pos + IW_EV_LCP_LEN <= end) {
2120                 /* Event data may be unaligned, so make a local, aligned copy
2121                  * before processing. */
2122                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2123                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2124                            iwe->cmd, iwe->len);
2125                 if (iwe->len <= IW_EV_LCP_LEN)
2126                         return;
2127
2128                 custom = pos + IW_EV_POINT_LEN;
2129                 if (drv->we_version > 18 &&
2130                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2131                      iwe->cmd == IWEVCUSTOM)) {
2132                         /* WE-19 removed the pointer from struct iw_point */
2133                         char *dpos = (char *) &iwe_buf.u.data.length;
2134                         int dlen = dpos - (char *) &iwe_buf;
2135                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2136                                sizeof(struct iw_event) - dlen);
2137                 } else {
2138                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2139                         custom += IW_EV_POINT_OFF;
2140                 }
2141
2142                 switch (iwe->cmd) {
2143                 case IWEVCUSTOM:
2144                         if (custom + iwe->u.data.length > end)
2145                                 return;
2146                         buf = malloc(iwe->u.data.length + 1);
2147                         if (buf == NULL)
2148                                 return;
2149                         memcpy(buf, custom, iwe->u.data.length);
2150                         buf[iwe->u.data.length] = '\0';
2151                         hostapd_wireless_event_wireless_custom(drv, buf);
2152                         free(buf);
2153                         break;
2154                 }
2155
2156                 pos += iwe->len;
2157         }
2158 }
2159
2160
2161 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2162                                                struct nlmsghdr *h, int len)
2163 {
2164         struct ifinfomsg *ifi;
2165         int attrlen, nlmsg_len, rta_len;
2166         struct rtattr *attr;
2167
2168         if (len < (int) sizeof(*ifi))
2169                 return;
2170
2171         ifi = NLMSG_DATA(h);
2172
2173         /* TODO: use ifi->ifi_index to filter out wireless events from other
2174          * interfaces */
2175
2176         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2177
2178         attrlen = h->nlmsg_len - nlmsg_len;
2179         if (attrlen < 0)
2180                 return;
2181
2182         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2183
2184         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2185         while (RTA_OK(attr, attrlen)) {
2186                 if (attr->rta_type == IFLA_WIRELESS) {
2187                         hostapd_wireless_event_wireless(
2188                                 drv, ((char *) attr) + rta_len,
2189                                 attr->rta_len - rta_len);
2190                 }
2191                 attr = RTA_NEXT(attr, attrlen);
2192         }
2193 }
2194
2195
2196 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2197                                            void *sock_ctx)
2198 {
2199         char buf[256];
2200         int left;
2201         struct sockaddr_nl from;
2202         socklen_t fromlen;
2203         struct nlmsghdr *h;
2204         struct i802_driver_data *drv = eloop_ctx;
2205
2206         fromlen = sizeof(from);
2207         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2208                         (struct sockaddr *) &from, &fromlen);
2209         if (left < 0) {
2210                 if (errno != EINTR && errno != EAGAIN)
2211                         perror("recvfrom(netlink)");
2212                 return;
2213         }
2214
2215         h = (struct nlmsghdr *) buf;
2216         while (left >= (int) sizeof(*h)) {
2217                 int len, plen;
2218
2219                 len = h->nlmsg_len;
2220                 plen = len - sizeof(*h);
2221                 if (len > left || plen < 0) {
2222                         printf("Malformed netlink message: "
2223                                "len=%d left=%d plen=%d\n",
2224                                len, left, plen);
2225                         break;
2226                 }
2227
2228                 switch (h->nlmsg_type) {
2229                 case RTM_NEWLINK:
2230                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2231                         break;
2232                 }
2233
2234                 len = NLMSG_ALIGN(len);
2235                 left -= len;
2236                 h = (struct nlmsghdr *) ((char *) h + len);
2237         }
2238
2239         if (left > 0) {
2240                 printf("%d extra bytes in the end of netlink message\n", left);
2241         }
2242 }
2243
2244
2245 static int hostap_get_we_version(struct i802_driver_data *drv)
2246 {
2247         struct iw_range *range;
2248         struct iwreq iwr;
2249         int minlen;
2250         size_t buflen;
2251
2252         drv->we_version = 0;
2253
2254         /*
2255          * Use larger buffer than struct iw_range in order to allow the
2256          * structure to grow in the future.
2257          */
2258         buflen = sizeof(struct iw_range) + 500;
2259         range = os_zalloc(buflen);
2260         if (range == NULL)
2261                 return -1;
2262
2263         memset(&iwr, 0, sizeof(iwr));
2264         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2265         iwr.u.data.pointer = (caddr_t) range;
2266         iwr.u.data.length = buflen;
2267
2268         minlen = ((char *) &range->enc_capa) - (char *) range +
2269                 sizeof(range->enc_capa);
2270
2271         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2272                 perror("ioctl[SIOCGIWRANGE]");
2273                 free(range);
2274                 return -1;
2275         } else if (iwr.u.data.length >= minlen &&
2276                    range->we_version_compiled >= 18) {
2277                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2278                            "WE(source)=%d enc_capa=0x%x",
2279                            range->we_version_compiled,
2280                            range->we_version_source,
2281                            range->enc_capa);
2282                 drv->we_version = range->we_version_compiled;
2283         }
2284
2285         free(range);
2286         return 0;
2287 }
2288
2289
2290 static int i802_wireless_event_init(void *priv)
2291 {
2292         struct i802_driver_data *drv = priv;
2293         int s;
2294         struct sockaddr_nl local;
2295
2296         hostap_get_we_version(drv);
2297
2298         drv->wext_sock = -1;
2299
2300         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2301         if (s < 0) {
2302                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2303                 return -1;
2304         }
2305
2306         memset(&local, 0, sizeof(local));
2307         local.nl_family = AF_NETLINK;
2308         local.nl_groups = RTMGRP_LINK;
2309         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2310                 perror("bind(netlink)");
2311                 close(s);
2312                 return -1;
2313         }
2314
2315         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2316                                  NULL);
2317         drv->wext_sock = s;
2318
2319         return 0;
2320 }
2321
2322
2323 static void i802_wireless_event_deinit(void *priv)
2324 {
2325         struct i802_driver_data *drv = priv;
2326         if (drv->wext_sock < 0)
2327                 return;
2328         eloop_unregister_read_sock(drv->wext_sock);
2329         close(drv->wext_sock);
2330 }
2331
2332
2333 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2334 {
2335         struct i802_driver_data *drv = priv;
2336         struct ieee80211_mgmt mgmt;
2337
2338         memset(&mgmt, 0, sizeof(mgmt));
2339         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2340                                           WLAN_FC_STYPE_DEAUTH);
2341         memcpy(mgmt.da, addr, ETH_ALEN);
2342         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2343         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2344         mgmt.u.deauth.reason_code = host_to_le16(reason);
2345         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2346                                       sizeof(mgmt.u.deauth), 0);
2347 }
2348
2349
2350 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2351 {
2352         struct i802_driver_data *drv = priv;
2353         struct ieee80211_mgmt mgmt;
2354
2355         memset(&mgmt, 0, sizeof(mgmt));
2356         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2357                                           WLAN_FC_STYPE_DISASSOC);
2358         memcpy(mgmt.da, addr, ETH_ALEN);
2359         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2360         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2361         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2362         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2363                                        sizeof(mgmt.u.disassoc), 0);
2364 }
2365
2366
2367 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2368 {
2369         struct i802_driver_data *drv;
2370
2371         drv = os_zalloc(sizeof(struct i802_driver_data));
2372         if (drv == NULL) {
2373                 printf("Could not allocate memory for i802 driver data\n");
2374                 return NULL;
2375         }
2376
2377         drv->hapd = hapd;
2378         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2379
2380         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2381         drv->if_indices = drv->default_if_indices;
2382         drv->bridge = if_nametoindex(hapd->conf->bridge);
2383
2384         if (i802_init_sockets(drv, bssid))
2385                 goto failed;
2386
2387         return drv;
2388
2389 failed:
2390         free(drv);
2391         return NULL;
2392 }
2393
2394
2395 static void *i802_init(struct hostapd_data *hapd)
2396 {
2397         return i802_init_bssid(hapd, NULL);
2398 }
2399
2400
2401 static void i802_deinit(void *priv)
2402 {
2403         struct i802_driver_data *drv = priv;
2404
2405         i802_del_beacon(drv);
2406
2407         /* remove monitor interface */
2408         nl80211_remove_iface(drv, drv->monitor_ifidx);
2409
2410         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2411
2412         if (drv->monitor_sock >= 0) {
2413                 eloop_unregister_read_sock(drv->monitor_sock);
2414                 close(drv->monitor_sock);
2415         }
2416         if (drv->ioctl_sock >= 0)
2417                 close(drv->ioctl_sock);
2418         if (drv->eapol_sock >= 0) {
2419                 eloop_unregister_read_sock(drv->eapol_sock);
2420                 close(drv->eapol_sock);
2421         }
2422
2423         genl_family_put(drv->nl80211);
2424         nl_cache_free(drv->nl_cache);
2425         nl_handle_destroy(drv->nl_handle);
2426         nl_cb_put(drv->nl_cb);
2427
2428         if (drv->if_indices != drv->default_if_indices)
2429                 free(drv->if_indices);
2430
2431         free(drv);
2432 }
2433
2434
2435 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2436         .name = "nl80211",
2437         .init = i802_init,
2438         .init_bssid = i802_init_bssid,
2439         .deinit = i802_deinit,
2440         .wireless_event_init = i802_wireless_event_init,
2441         .wireless_event_deinit = i802_wireless_event_deinit,
2442         .set_ieee8021x = i802_set_ieee8021x,
2443         .set_privacy = i802_set_privacy,
2444         .set_encryption = i802_set_encryption,
2445         .get_seqnum = i802_get_seqnum,
2446         .flush = i802_flush,
2447         .read_sta_data = i802_read_sta_data,
2448         .send_eapol = i802_send_eapol,
2449         .sta_set_flags = i802_sta_set_flags,
2450         .sta_deauth = i802_sta_deauth,
2451         .sta_disassoc = i802_sta_disassoc,
2452         .sta_remove = i802_sta_remove,
2453         .set_ssid = i802_set_ssid,
2454         .send_mgmt_frame = i802_send_mgmt_frame,
2455         .sta_add2 = i802_sta_add2,
2456         .get_inact_sec = i802_get_inact_sec,
2457         .sta_clear_stats = i802_sta_clear_stats,
2458         .set_freq = i802_set_freq,
2459         .set_rts = i802_set_rts,
2460         .get_rts = i802_get_rts,
2461         .set_frag = i802_set_frag,
2462         .get_frag = i802_get_frag,
2463         .set_retry = i802_set_retry,
2464         .get_retry = i802_get_retry,
2465         .set_rate_sets = i802_set_rate_sets,
2466         .set_channel_flag = i802_set_channel_flag,
2467         .set_regulatory_domain = i802_set_regulatory_domain,
2468         .set_beacon = i802_set_beacon,
2469         .set_internal_bridge = i802_set_internal_bridge,
2470         .set_beacon_int = i802_set_beacon_int,
2471         .set_dtim_period = i802_set_dtim_period,
2472         .set_cts_protect = i802_set_cts_protect,
2473         .set_preamble = i802_set_preamble,
2474         .set_short_slot_time = i802_set_short_slot_time,
2475         .set_tx_queue_params = i802_set_tx_queue_params,
2476         .bss_add = i802_bss_add,
2477         .bss_remove = i802_bss_remove,
2478         .if_add = i802_if_add,
2479         .if_update = i802_if_update,
2480         .if_remove = i802_if_remove,
2481         .get_hw_feature_data = i802_get_hw_feature_data,
2482         .set_sta_vlan = i802_set_sta_vlan,
2483 };